<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref } from 'vue'
import { ElMessage } from 'element-plus'
//控制注册与登录表单的显示， 默认显示注册
const isRegister = ref(false)
// 定义注册数据类型
const registerData = ref({
  username: '',
  password: '',
  rePassword: ''
})

// 校验密码函数
const checkRePassword = (rule, value, callback) => {
  if (value === '') {
    callback(new Error('请重新输入密码'))
  } else if (value !== registerData.value.password) {
    callback(new Error('请确认两次输入的密码相同'))
  } else {
    callback()
  }
}

// 定义注册表单校验规则
const rules = {
  username: [
    { required: true, message: '请输入用户名', trigger: 'blur' },
    { min: 4, max: 16, message: '长度为 4~16 位非空字符', trigger: 'blur' }
  ],
  password: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    { min: 4, max: 16, message: '长度为 4~16 位非空字符', trigger: 'blur' }
  ],
  rePassword: [
    { validator: checkRePassword, trigger: 'blur' }
  ]
}

// 调用后台接口，完成注册
import { userRegisterService , userLoginService } from '@/api/user.js'

const register = async () => {
  let result = await userRegisterService(registerData.value)

  ElMessage.success(result.msg? result.msg: '注册成功');

}
//绑定数据模型,复用注册表单的数据模型
//表单数据校验
// 登录函数

import { useRouter } from 'vue-router'
import { useTokenStore } from '@/stores/token.js'
const router = useRouter()
const tokenStore = useTokenStore()
const login = async () => {
  // 调用用户登录服务，传入登录数据
  let result = await userLoginService(registerData.value)

  ElMessage.success(result.msg ? result.msg : '登录成功')
  //把得到的token存储到pinia中
  tokenStore.setToken(result.data)
  //跳转首页  
  router.push('/')
}

//定义函数，清空数据模型的数据
const clearRegisterData = ()=>{
  registerData.value={
    username: '',
    password: '',
    rePassword: ''
  }
}

</script>

<template>
    <el-row class="login-page">  
      <!-- 注册表单 -->
        <el-form ref="form" size="large" autocomplete="off" v-if="isRegister" :model="registerData" :rules="rules">
          <el-form-item>
            <h1>注册</h1>
          </el-form-item>
          <el-form-item prop="username">
            <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input :prefix-icon="Lock" type="password" placeholder="请输入密码" v-model="registerData.password"></el-input>
          </el-form-item>
          <el-form-item prop="rePassword">
            <el-input :prefix-icon="Lock" type="password" placeholder="请输入再次密码" v-model="registerData.rePassword"></el-input>
          </el-form-item>
          <!-- 注册按钮 -->
          <el-form-item>
            <el-button class="button" type="primary" auto-insert-space @click="register">
              注册
            </el-button>
          </el-form-item>
          <el-form-item class="flex">
            <el-link type="info" :underline="false" @click="isRegister = false ; clearRegisterData()">
              ← 返回
            </el-link>
          </el-form-item>
          </el-form>
          <!-- 登录表单 -->
          <el-form ref="form" size="large" autocomplete="off" v-else :model="registerData" :rules="rules">
              <el-form-item>
                  <h1>登录</h1>
              </el-form-item>
              <el-form-item prop="username">
                  <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
              </el-form-item>
              <el-form-item prop="password">
                  <el-input name="password" :prefix-icon="Lock" type="password" placeholder="请输入密码"  v-model="registerData.password"></el-input>
              </el-form-item>
              <el-form-item class="flex">
                  <div class="flex">
                      <el-checkbox>记住我</el-checkbox>
                      <el-link type="primary" :underline="false">忘记密码？</el-link>
                  </div>
              </el-form-item>
              <!-- 登录按钮 -->
              <el-form-item>
                  <el-button class="button" type="primary" auto-insert-space @click="login">登录</el-button>
              </el-form-item>
              <el-form-item class="flex">
                  <el-link type="info" :underline="false" @click="isRegister = true ; clearRegisterData()">
                    注册 →
                  </el-link>
          </el-form-item>
        </el-form>
    </el-row>
</template>


<style lang="scss" scoped>
/* 外层容器：全局居中核心 */
.login-page {
  height: 100vh;        /* 占满视口高度 */
  display: flex;        /* 开启 Flex 布局 */
  justify-content: center; /* 水平居中 */
  align-items: center;     /* 垂直居中 */
  position: relative;      /* 为背景定位做准备 */
  background-color: #fff;  /* 页面背景色 */
}

/* 左侧背景（可选，根据设计需求保留/删除） */
.bg {
  position: absolute;
  left: 0;
  top: 0;
  width: 50%;          /* 背景占左半屏 */
  height: 100%;
  background: #f5f7fa; /* 背景色示例 */
}

/* 表单容器：内部元素对齐 */
.form {
  display: flex;
  flex-direction: column; /* 垂直排列 */
  align-items: center;     /* 内部元素水平居中！关键修复点 */
  user-select: none;
  width: 300px;
  padding: 30px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.1);
  position: relative;
  z-index: 1; /* 确保表单在背景之上 */
}

/* 表单行：处理复选框和链接的对齐 */
.form-row {
  display: flex;
  justify-content: space-between; /* 两端对齐 */
  align-items: center;
  width: 100%; /* 占满表单宽度 */
}

/* 按钮样式（可选优化） */
.button {
  width: 100%; /* 按钮占满表单宽度 */
}
</style>